Same here in Kazakhstan. And we also use our home-made crypto algorithms (derived from USSR GOST), which are not present in popular open source libraries.
I don't really know, sorry. We have our own identifiers for algorithms like СТ РК ГОСТ Р 34.10-2015, СТ РК ГОСТ Р 34.11-2015 and our local company (nitec.kz) creates SDK which includes implementations of those algorithms for Java and OpenSSL.
Whether they copied those algorithms from Russian ones, I don't know, never researched that.
Same in Sweden and Denmark, several gov't systems requiring signed XMLs. And before you think legacy systems, no, these are the new systems, with rollout starting a few years ago and still ongoing.